Genetic Variant OTC:p.Gly106Val (chrX-38381360-G-T) – ACMG Classification: Likely_pathogenic (7 pts)

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM2PP3_StrongPP5

The NM_000531.6(OTC):c.317G>T(p.Gly106Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars).

Frequency

Genomes: 𝑓 0.0 ( 0 hom., 0 hem., cov: 24)

Failed GnomAD Quality Control

Consequence

OTC
NM_000531.6 missense

Scores

Clinical Significance

Pathogenic no assertion criteria provided P:1

Conservation

PhyloP100: 7.34

Variant links:

Genes affected

OTC (HGNC:8512): (ornithine transcarbamylase) This nuclear gene encodes a mitochondrial matrix enzyme. The encoded protein is involved in the urea cycle which functions to detoxify ammonia into urea for excretion. Mutations in this enzyme lead to ornithine transcarbamylase deficiency, which causes hyperammonemia. [provided by RefSeq, May 2022]

OTC links:

ENSG00000250349 (HGNC:):

ENSG00000250349 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.996

PP5

Variant X-38381360-G-T is Pathogenic according to our data. Variant chrX-38381360-G-T is described in ClinVar as [Pathogenic]. Clinvar id is 97169.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OTC	NM_000531.6 link	c.317G>T	p.Gly106Val	missense_variant	Exon 4 of 10	ENST00000039007.5	NP_000522.3	P00480
OTC	NM_001407092.1 link	c.317G>T	p.Gly106Val	missense_variant	Exon 6 of 12		NP_001394021.1
OTC	XM_017029556.2 link	c.317G>T	p.Gly106Val	missense_variant	Exon 4 of 9		XP_016885045.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
OTC	ENST00000039007.5 link	c.317G>T	p.Gly106Val	missense_variant	Exon 4 of 10	1	NM_000531.6	ENSP00000039007.4		P00480
ENSG00000250349	ENST00000465127.1 link	c.172-284761G>T		intron_variant	Intron 3 of 8	5		ENSP00000417050.1		B4E171

Frequencies

GnomAD3 genomes

AF:

0.00

AC:

AN:

110350

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

32688

FAILED QC

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

Cov.:

GnomAD4 genome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

110350

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

32688

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

not provided

Pathogenic:1

GenMed Metabolism Lab

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.97

BayesDel_addAF

Pathogenic

0.72

BayesDel_noAF

Pathogenic

0.79

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.97

FATHMM_MKL

Uncertain

0.96

LIST_S2

Pathogenic

0.97

M_CAP

Pathogenic

0.97

MetaRNN

Pathogenic

1.0

MetaSVM

Pathogenic

1.1

MutationAssessor

Pathogenic

3.5

PrimateAI

Uncertain

0.73

PROVEAN

Pathogenic

-8.2

REVEL

Pathogenic

0.97

Sift

Uncertain

0.0010

Sift4G

Uncertain

0.0020

Polyphen

1.0

Vest4

0.99

MutPred

0.97

Loss of catalytic residue at L111 (P = 0.1483);

MVP

1.0

MPC

1.3

ClinPred

1.0

GERP RS

5.8

Varity_R

0.99

gMVP

1.0

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over